<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap demo</title>
    <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>

<body>
    <header>
        <!-- 顶部 -->
        <nav class="navbar navbar-expand-lg navbar-light bg-light">
            <a class="navbar-brand" href="#">商品分类</a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#Nav1">
                <span class="navbar-toggler-icon"></span>
            </button>
            <!-- 导航折叠 -->
            <div class="collapse navbar-collapse" id="Nav1">
                <ul class="navbar-nav">
                    <li class="nav-item active"><a class="nav-link" href="#">白酒</a></li>
                    <li class="nav-item"><a class="nav-link" href="#">红酒</a></li>
                    <li class="nav-item dropdown">
                        <a class="nav-link dropdown-toggle" id="Dropdown" data-toggle="dropdown" href="#">葡萄酒</a>
                        <div class="dropdown-menu">
                            <a class="dropdown-item" href="#">白葡萄酒</a>
                            <a class="dropdown-item" href="#">红葡萄酒</a>
                            <a class="dropdown-item" href="#">紫葡萄酒</a>
                        </div>
                    </li>
                    <li class="nav-item"></li>
                </ul>
            </div>
        </nav>
    </header>
    <!-- 正义 -->
    <div class="container mt-3">
        <!-- 搜索内容（pc) -->
        <div class="row">
            <!-- pc端布局显示 -->
            <aside class="col-lg-3 col-12 d-lg-block d-none">
                <div class="list-group">
                    <button type="button" class="list-group-item list-group-item-action active" disabled>中国</button>
                    <button type="button" class="list-group-item list-group-item-action">法国</button>
                    <button type="button" class="list-group-item list-group-item-action">美国</button>
                    <button type="button" class="list-group-item list-group-item-action">英国</button>
                </div>
            </aside>
            <!-- 移动端 -->
            <aside class="col-lg-3 col-12 d-block d-lg-none mb-2">
                <div class="list-group d-flex flex-row justify-content-between align-items-center">
                    <button type="button" class="list-group-item active p-1" disabled>中国</button>
                    <button type="button" class="list-group-item p-1">法国</button>
                    <button type="button" class="list-group-item p-1">美国</button>
                    <button type="button" class="list-group-item p-1">英国</button>

                </div>
            </aside>
        </div>
        <footer>

        </footer>
    </div>
</body>

</html>